.main_source_content
{
    height: 500px;
    width: 1000px;
}
.main_source_content_teacher
{
    height: 50px;
    width: 1000px;
    background-color: transparent;
}

.main_source_content_student
{
    height: 450px;
    width: 1000px;

}
.student_left
{
    height: 448px;
    width: 500px;

    float: left;
}
.student_left_img
{
    height: 350px;
    width: 300px;
    background-color: rgba(0,0,0,0.1);
    border-radius: 10px 10px 10px 10px;
    margin-left: 100px;

}
.student_left_a
{
    height: 50px;
    width: 300px;
   background-color: rgba(0,0,0,0.1);
    margin-top: 25px;
    border-radius: 10px 10px 10px 10px;
    margin-left: 100px;
}
.student_right
{
    height: 448px;
    width: 500px;
    float: left;

}
.student_right_img
{
    height: 350px;
    width: 300px;
    background-color: rgba(0,0,0,0.1);
    border-radius: 10px 10px 10px 10px;
    margin-left: 100px;

}
.student_right_a
{
    height: 50px;
    width: 300px;
    background-color: rgba(0,0,0,0.1);
    margin-top: 25px;
    border-radius: 10px 10px 10px 10px;
    margin-left: 100px;
}
